Below are lists of Liberal marginal seats showing which constituencies won in the latest elections can be most easily lost.
Historical
Below is the Liberal defence list consisting of Liberal held marginal seats for the 1983 general election based on the 1979 boundaries. These marginal constituencies are ordered from the most vulnerable seats to the safest.
| Rank | Constituency | Region | Majority | Swing to Defeat | |
|---|---|---|---|---|---|
| 1. | Isle of Wight | South East | 352 | 0.24% | |
| 2. | Colne Valley | Yorkshire and the Humber | 2,352 | 2.24% | |
| 3. | Isle of Ely | East of England | 3,330 | 2.95% | |
| 4. | Cardigan | Wales | 2,194 | 2.95% | |
| 5. | Inverness | Scotland | 4,157 | 4.46% | |
| 6. | Rochdale | North West | 5,294 | 5.38% | |
| 7. | Truro | South West | 8,708 | 6.85% | |
| 8. | Berwick-upon-Tweed | North East | 5,688 | 7.99% | |
| 9. | Liverpool Edge Hill | North West | 4,248 | 8.70% | |
| 10. | Roxburgh, Selkirk and Peebles | Scotland | 10,690 | 10.92% | |
| 11. | Orkney and Shetland | Scotland | 6,810 | 17.54% |